What should be considered for the charging process of the batteries?

If the tester is not used for a longer period of time, the batteries, accumulators or accumulator pack should preferably be removed from the tester.

If the batteries / battery pack have not been used or charged for a long time - and are possibly deeply discharged - observe the charging process (signalled by LEDs on the charger).

If necessary, start another charging process by disconnecting the charger from the mains and from the tester and reconnecting it.